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OpenStudy (anonymous):
Can anybody check this for me.
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OpenStudy (anonymous):
Magnesium sulphate crystals \[(MgSO _{4}7H _{2}O)\] can be dehydrated by heating. Calculate the percentage by mass of water present in the molecule.
OpenStudy (anonymous):
% composition of element=mass of element --------------* 100 total mass
OpenStudy (anonymous):
% composition of element=18 ---*100 246 =7.317073171
OpenStudy (anonymous):
is this right???
OpenStudy (ipwnbunnies):
Should be right. :)
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OpenStudy (kc_kennylau):
You missed out the % sign in the answer I suppose
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